The .25 Remington is one in a series of 4 Remington auto-loading cartridges, introduced in 1906 for the Remington Model 8Auto-Loader rifle.The 30 Remington was Remington's "rimless" answer to the30-30 Winchester, with basically the same ballisticsas the 30-30, howeverthe 30-30 Winchester will not work in a .30 Remington..The series of auto-loading cartridges which included the .25, .30, .32, and .35 Remington, sometimes also called RemingtonAuto-loads.The .25, .30, and .32 are the same case with differentdiameter projectiles, the .35 is a wider case.Very Hard calibers to find in resent years.see 25 remington Auto available below: